Compression creep of copper under electric current studied by a spark plasma sintering (SPS) apparatus

Barak Ratzker; Maxim Sokol; Sergey Kalabukhov; Nachum Frage

doi:10.1016/j.msea.2017.12.005

Compression creep of copper under electric current studied by a spark plasma sintering (SPS) apparatus

Barak Ratzker, Maxim Sokol, Sergey Kalabukhov, Nachum Frage^*

^*Corresponding author for this work

Ben-Gurion University of the Negev

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

A spark plasma sintering (SPS) apparatus was successfully employed to perform uniaxial compressive creep tests on pure copper under a stress of 30 MPa in the 400–600 °C temperature range. By utilizing two different configurations, the creep experiments were conducted without or with a low-density pulsed direct electric current (~ 6–7 A/mm²) passing through the samples. It was found that under the influence of the applied electric current, the creep rate increased significantly, while the extent of the effect diminished with temperature. The apparent activation energy for creep with applied current decreased from 110 to 66 kJ/mol. This was attributed to the effect of current on the thermally-activated process and dislocations motion. No distinct evidence that the electric current affects the microstructure was observed.

Original language	English
Pages (from-to)	424-429
Number of pages	6
Journal	Materials Science and Engineering: A
Volume	712
DOIs	https://doi.org/10.1016/j.msea.2017.12.005
State	Published - 17 Jan 2018
Externally published	Yes

Keywords

Activation energy
Compression creep
Copper
Electro-plastic deformation
Spark plasma sintering apparatus

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10.1016/j.msea.2017.12.005

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title = "Compression creep of copper under electric current studied by a spark plasma sintering (SPS) apparatus",

abstract = "A spark plasma sintering (SPS) apparatus was successfully employed to perform uniaxial compressive creep tests on pure copper under a stress of 30 MPa in the 400–600 °C temperature range. By utilizing two different configurations, the creep experiments were conducted without or with a low-density pulsed direct electric current (~ 6–7 A/mm2) passing through the samples. It was found that under the influence of the applied electric current, the creep rate increased significantly, while the extent of the effect diminished with temperature. The apparent activation energy for creep with applied current decreased from 110 to 66 kJ/mol. This was attributed to the effect of current on the thermally-activated process and dislocations motion. No distinct evidence that the electric current affects the microstructure was observed.",

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AU - Ratzker, Barak

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AU - Kalabukhov, Sergey

AU - Frage, Nachum

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AB - A spark plasma sintering (SPS) apparatus was successfully employed to perform uniaxial compressive creep tests on pure copper under a stress of 30 MPa in the 400–600 °C temperature range. By utilizing two different configurations, the creep experiments were conducted without or with a low-density pulsed direct electric current (~ 6–7 A/mm2) passing through the samples. It was found that under the influence of the applied electric current, the creep rate increased significantly, while the extent of the effect diminished with temperature. The apparent activation energy for creep with applied current decreased from 110 to 66 kJ/mol. This was attributed to the effect of current on the thermally-activated process and dislocations motion. No distinct evidence that the electric current affects the microstructure was observed.

KW - Activation energy

KW - Compression creep

KW - Copper

KW - Electro-plastic deformation

KW - Spark plasma sintering apparatus

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Compression creep of copper under electric current studied by a spark plasma sintering (SPS) apparatus

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Keywords

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